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annotate src/share/vm/prims/whitebox.cpp @ 9080:b84fd7d73702

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8007288: Additional WB API for compiler's testing Reviewed-by: kvn, vlivanov
author iignatyev
date Tue, 09 Apr 2013 09:54:17 -0700
parents ede380e13960
children 7a5aec879506
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26
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27 #include "memory/universe.hpp"
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28 #include "oops/oop.inline.hpp"
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29
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30 #include "classfile/symbolTable.hpp"
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31 #include "classfile/classLoaderData.hpp"
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32
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33 #include "prims/whitebox.hpp"
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34 #include "prims/wbtestmethods/parserTests.hpp"
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35
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36 #include "runtime/interfaceSupport.hpp"
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37 #include "runtime/os.hpp"
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38 #include "utilities/debug.hpp"
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39 #include "utilities/macros.hpp"
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40
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41 #if INCLUDE_ALL_GCS
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42 #include "gc_implementation/g1/concurrentMark.hpp"
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43 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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44 #include "gc_implementation/g1/heapRegionRemSet.hpp"
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45 #endif // INCLUDE_ALL_GCS
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46
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47 #ifdef INCLUDE_NMT
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48 #include "services/memTracker.hpp"
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49 #endif // INCLUDE_NMT
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50
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51 #include "compiler/compileBroker.hpp"
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52 #include "runtime/compilationPolicy.hpp"
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53
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54 bool WhiteBox::_used = false;
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55
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56 WB_ENTRY(jlong, WB_GetObjectAddress(JNIEnv* env, jobject o, jobject obj))
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57 return (jlong)(void*)JNIHandles::resolve(obj);
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58 WB_END
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59
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60 WB_ENTRY(jint, WB_GetHeapOopSize(JNIEnv* env, jobject o))
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61 return heapOopSize;
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62 WB_END
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63
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64
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65 class WBIsKlassAliveClosure : public KlassClosure {
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66 Symbol* _name;
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67 bool _found;
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68 public:
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69 WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
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70
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71 void do_klass(Klass* k) {
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72 if (_found) return;
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73 Symbol* ksym = k->name();
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74 if (ksym->fast_compare(_name) == 0) {
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75 _found = true;
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76 }
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77 }
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78
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79 bool found() const {
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80 return _found;
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81 }
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82 };
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83
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84 WB_ENTRY(jboolean, WB_IsClassAlive(JNIEnv* env, jobject target, jstring name))
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85 Handle h_name = JNIHandles::resolve(name);
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86 if (h_name.is_null()) return false;
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87 Symbol* sym = java_lang_String::as_symbol(h_name, CHECK_false);
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88 TempNewSymbol tsym(sym); // Make sure to decrement reference count on sym on return
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89
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90 WBIsKlassAliveClosure closure(sym);
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91 ClassLoaderDataGraph::classes_do(&closure);
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92
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93 return closure.found();
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94 WB_END
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95
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96 #if INCLUDE_ALL_GCS
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97 WB_ENTRY(jboolean, WB_G1IsHumongous(JNIEnv* env, jobject o, jobject obj))
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98 G1CollectedHeap* g1 = G1CollectedHeap::heap();
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99 oop result = JNIHandles::resolve(obj);
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100 const HeapRegion* hr = g1->heap_region_containing(result);
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101 return hr->isHumongous();
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102 WB_END
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103
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104 WB_ENTRY(jlong, WB_G1NumFreeRegions(JNIEnv* env, jobject o))
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105 G1CollectedHeap* g1 = G1CollectedHeap::heap();
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106 size_t nr = g1->free_regions();
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107 return (jlong)nr;
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108 WB_END
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109
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110 WB_ENTRY(jboolean, WB_G1InConcurrentMark(JNIEnv* env, jobject o))
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111 G1CollectedHeap* g1 = G1CollectedHeap::heap();
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112 ConcurrentMark* cm = g1->concurrent_mark();
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113 return cm->concurrent_marking_in_progress();
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114 WB_END
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115
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116 WB_ENTRY(jint, WB_G1RegionSize(JNIEnv* env, jobject o))
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117 return (jint)HeapRegion::GrainBytes;
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118 WB_END
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119 #endif // INCLUDE_ALL_GCS
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120
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121 #ifdef INCLUDE_NMT
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122 // Keep track of the 3 allocations in NMTAllocTest so we can free them later
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123 // on and verify that they're not visible anymore
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124 static void* nmtMtTest1 = NULL, *nmtMtTest2 = NULL, *nmtMtTest3 = NULL;
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125
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126 // Alloc memory using the test memory type so that we can use that to see if
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127 // NMT picks it up correctly
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128 WB_ENTRY(jboolean, WB_NMTAllocTest(JNIEnv* env))
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129 void *mem;
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130
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131 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
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132 return false;
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133 }
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134
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135 // Allocate 2 * 128k + 256k + 1024k and free the 1024k one to make sure we track
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136 // everything correctly. Total should be 512k held alive.
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137 nmtMtTest1 = os::malloc(128 * 1024, mtTest);
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138 mem = os::malloc(1024 * 1024, mtTest);
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139 nmtMtTest2 = os::malloc(256 * 1024, mtTest);
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140 os::free(mem, mtTest);
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141 nmtMtTest3 = os::malloc(128 * 1024, mtTest);
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142
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143 return true;
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144 WB_END
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145
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146 // Free the memory allocated by NMTAllocTest
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147 WB_ENTRY(jboolean, WB_NMTFreeTestMemory(JNIEnv* env))
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148
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149 if (nmtMtTest1 == NULL || nmtMtTest2 == NULL || nmtMtTest3 == NULL) {
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150 return false;
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151 }
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152
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153 os::free(nmtMtTest1, mtTest);
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154 nmtMtTest1 = NULL;
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155 os::free(nmtMtTest2, mtTest);
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156 nmtMtTest2 = NULL;
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157 os::free(nmtMtTest3, mtTest);
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158 nmtMtTest3 = NULL;
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159
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160 return true;
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161 WB_END
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162
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163 // Block until the current generation of NMT data to be merged, used to reliably test the NMT feature
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164 WB_ENTRY(jboolean, WB_NMTWaitForDataMerge(JNIEnv* env))
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165
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166 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
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167 return false;
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168 }
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169
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170 return MemTracker::wbtest_wait_for_data_merge();
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171 WB_END
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172
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173 #endif // INCLUDE_NMT
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174
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175 static jmethodID reflected_method_to_jmid(JavaThread* thread, JNIEnv* env, jobject method) {
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176 assert(method != NULL, "method should not be null");
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177 ThreadToNativeFromVM ttn(thread);
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178 return env->FromReflectedMethod(method);
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179 }
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180
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181 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
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182 MutexLockerEx mu(Compile_lock);
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183 CodeCache::mark_all_nmethods_for_deoptimization();
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184 VM_Deoptimize op;
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185 VMThread::execute(&op);
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186 WB_END
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187
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188 WB_ENTRY(jint, WB_DeoptimizeMethod(JNIEnv* env, jobject o, jobject method))
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189 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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190 MutexLockerEx mu(Compile_lock);
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191 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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192 int result = 0;
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193 nmethod* code = mh->code();
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194 if (code != NULL) {
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195 code->mark_for_deoptimization();
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196 ++result;
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197 }
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198 result += CodeCache::mark_for_deoptimization(mh());
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199 if (result > 0) {
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200 VM_Deoptimize op;
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201 VMThread::execute(&op);
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202 }
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203 return result;
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204 WB_END
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205
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206 WB_ENTRY(jboolean, WB_IsMethodCompiled(JNIEnv* env, jobject o, jobject method))
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207 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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208 MutexLockerEx mu(Compile_lock);
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209 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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210 nmethod* code = mh->code();
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211 if (code == NULL) {
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212 return JNI_FALSE;
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213 }
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214 return (code->is_alive() && !code->is_marked_for_deoptimization());
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215 WB_END
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216
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217 WB_ENTRY(jboolean, WB_IsMethodCompilable(JNIEnv* env, jobject o, jobject method, jint comp_level))
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218 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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219 MutexLockerEx mu(Compile_lock);
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220 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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221 return CompilationPolicy::can_be_compiled(mh, comp_level);
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222 WB_END
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223
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224 WB_ENTRY(jboolean, WB_IsMethodQueuedForCompilation(JNIEnv* env, jobject o, jobject method))
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225 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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226 MutexLockerEx mu(Compile_lock);
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227 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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228 return mh->queued_for_compilation();
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229 WB_END
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230
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diff changeset
231 WB_ENTRY(jint, WB_GetMethodCompilationLevel(JNIEnv* env, jobject o, jobject method))
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232 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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233 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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234 nmethod* code = mh->code();
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235 return (code != NULL ? code->comp_level() : CompLevel_none);
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236 WB_END
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237
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238
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239 WB_ENTRY(void, WB_MakeMethodNotCompilable(JNIEnv* env, jobject o, jobject method))
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240 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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241 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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242 mh->set_not_compilable();
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243 WB_END
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244
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245 WB_ENTRY(jboolean, WB_TestSetDontInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
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246 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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247 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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248 bool result = mh->dont_inline();
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249 mh->set_dont_inline(value == JNI_TRUE);
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250 return result;
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251 WB_END
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252
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253 WB_ENTRY(jint, WB_GetCompileQueuesSize(JNIEnv* env, jobject o))
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254 return CompileBroker::queue_size(CompLevel_full_optimization) /* C2 */ +
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255 CompileBroker::queue_size(CompLevel_full_profile) /* C1 */;
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256 WB_END
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257
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258
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259 WB_ENTRY(jboolean, WB_TestSetForceInlineMethod(JNIEnv* env, jobject o, jobject method, jboolean value))
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260 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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261 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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262 bool result = mh->force_inline();
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263 mh->set_force_inline(value == JNI_TRUE);
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264 return result;
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265 WB_END
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266
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267 WB_ENTRY(jboolean, WB_EnqueueMethodForCompilation(JNIEnv* env, jobject o, jobject method, jint comp_level))
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268 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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269 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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270 nmethod* nm = CompileBroker::compile_method(mh, InvocationEntryBci, comp_level, mh, mh->invocation_count(), "WhiteBox", THREAD);
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271 MutexLockerEx mu(Compile_lock);
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272 return (mh->queued_for_compilation() || nm != NULL);
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273 WB_END
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274
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275 WB_ENTRY(void, WB_ClearMethodState(JNIEnv* env, jobject o, jobject method))
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276 jmethodID jmid = reflected_method_to_jmid(thread, env, method);
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277 methodHandle mh(THREAD, Method::checked_resolve_jmethod_id(jmid));
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278 MutexLockerEx mu(Compile_lock);
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279 MethodData* mdo = mh->method_data();
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280
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281 if (mdo != NULL) {
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282 mdo->init();
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283 ResourceMark rm;
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284 int arg_count = mdo->method()->size_of_parameters();
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285 for (int i = 0; i < arg_count; i++) {
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286 mdo->set_arg_modified(i, 0);
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287 }
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288 }
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289
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290 mh->backedge_counter()->init();
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291 mh->invocation_counter()->init();
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292 mh->set_interpreter_invocation_count(0);
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293 mh->set_interpreter_throwout_count(0);
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294 mh->clear_not_c1_compilable();
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295 mh->clear_not_c2_compilable();
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296 mh->clear_not_c2_osr_compilable();
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297 NOT_PRODUCT(mh->set_compiled_invocation_count(0));
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298
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diff changeset
299 #ifdef TIERED
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300 mh->set_rate(0.0F);
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301 mh->set_prev_event_count(0);
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302 mh->set_prev_time(0);
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303 #endif
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304 WB_END
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305
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306 WB_ENTRY(jboolean, WB_IsInStringTable(JNIEnv* env, jobject o, jstring javaString))
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307 ResourceMark rm(THREAD);
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diff changeset
308 int len;
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309 jchar* name = java_lang_String::as_unicode_string(JNIHandles::resolve(javaString), len);
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310 oop found_string = StringTable::the_table()->lookup(name, len);
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311 if (found_string == NULL) {
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312 return false;
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313 }
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314 return true;
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315 WB_END
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316
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317
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318 WB_ENTRY(void, WB_FullGC(JNIEnv* env, jobject o))
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319 Universe::heap()->collector_policy()->set_should_clear_all_soft_refs(true);
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320 Universe::heap()->collect(GCCause::_last_ditch_collection);
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321 WB_END
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322
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323 //Some convenience methods to deal with objects from java
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324 int WhiteBox::offset_for_field(const char* field_name, oop object,
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325 Symbol* signature_symbol) {
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326 assert(field_name != NULL && strlen(field_name) > 0, "Field name not valid");
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327 Thread* THREAD = Thread::current();
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328
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329 //Get the class of our object
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330 Klass* arg_klass = object->klass();
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331 //Turn it into an instance-klass
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332 InstanceKlass* ik = InstanceKlass::cast(arg_klass);
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333
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334 //Create symbols to look for in the class
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335 TempNewSymbol name_symbol = SymbolTable::lookup(field_name, (int) strlen(field_name),
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336 THREAD);
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337
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338 //To be filled in with an offset of the field we're looking for
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339 fieldDescriptor fd;
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340
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341 Klass* res = ik->find_field(name_symbol, signature_symbol, &fd);
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342 if (res == NULL) {
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343 tty->print_cr("Invalid layout of %s at %s", ik->external_name(),
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344 name_symbol->as_C_string());
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345 fatal("Invalid layout of preloaded class");
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346 }
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347
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348 //fetch the field at the offset we've found
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349 int dest_offset = fd.offset();
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350
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351 return dest_offset;
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352 }
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353
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354
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355 const char* WhiteBox::lookup_jstring(const char* field_name, oop object) {
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356 int offset = offset_for_field(field_name, object,
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357 vmSymbols::string_signature());
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358 oop string = object->obj_field(offset);
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359 if (string == NULL) {
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360 return NULL;
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361 }
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362 const char* ret = java_lang_String::as_utf8_string(string);
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363 return ret;
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364 }
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365
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366 bool WhiteBox::lookup_bool(const char* field_name, oop object) {
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367 int offset =
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368 offset_for_field(field_name, object, vmSymbols::bool_signature());
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369 bool ret = (object->bool_field(offset) == JNI_TRUE);
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370 return ret;
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371 }
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372
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373
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374 #define CC (char*)
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375
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376 static JNINativeMethod methods[] = {
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377 {CC"getObjectAddress", CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress },
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378 {CC"getHeapOopSize", CC"()I", (void*)&WB_GetHeapOopSize },
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379 {CC"isClassAlive0", CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive },
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380 {CC"parseCommandLine",
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381 CC"(Ljava/lang/String;[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
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382 (void*) &WB_ParseCommandLine
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383 },
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384 #if INCLUDE_ALL_GCS
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385 {CC"g1InConcurrentMark", CC"()Z", (void*)&WB_G1InConcurrentMark},
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386 {CC"g1IsHumongous", CC"(Ljava/lang/Object;)Z", (void*)&WB_G1IsHumongous },
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387 {CC"g1NumFreeRegions", CC"()J", (void*)&WB_G1NumFreeRegions },
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388 {CC"g1RegionSize", CC"()I", (void*)&WB_G1RegionSize },
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389 #endif // INCLUDE_ALL_GCS
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390 #ifdef INCLUDE_NMT
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391 {CC"NMTAllocTest", CC"()Z", (void*)&WB_NMTAllocTest },
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392 {CC"NMTFreeTestMemory", CC"()Z", (void*)&WB_NMTFreeTestMemory },
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393 {CC"NMTWaitForDataMerge",CC"()Z", (void*)&WB_NMTWaitForDataMerge},
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394 #endif // INCLUDE_NMT
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395 {CC"deoptimizeAll", CC"()V", (void*)&WB_DeoptimizeAll },
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396 {CC"deoptimizeMethod", CC"(Ljava/lang/reflect/Method;)I",
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397 (void*)&WB_DeoptimizeMethod },
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398 {CC"isMethodCompiled", CC"(Ljava/lang/reflect/Method;)Z",
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399 (void*)&WB_IsMethodCompiled },
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400 {CC"isMethodCompilable", CC"(Ljava/lang/reflect/Method;I)Z",
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401 (void*)&WB_IsMethodCompilable},
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402 {CC"isMethodQueuedForCompilation",
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403 CC"(Ljava/lang/reflect/Method;)Z", (void*)&WB_IsMethodQueuedForCompilation},
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404 {CC"makeMethodNotCompilable",
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405 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_MakeMethodNotCompilable},
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406 {CC"testSetDontInlineMethod",
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407 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_TestSetDontInlineMethod},
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408 {CC"getMethodCompilationLevel",
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409 CC"(Ljava/lang/reflect/Method;)I", (void*)&WB_GetMethodCompilationLevel},
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410 {CC"getCompileQueuesSize",
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411 CC"()I", (void*)&WB_GetCompileQueuesSize},
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412 {CC"testSetForceInlineMethod",
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413 CC"(Ljava/lang/reflect/Method;Z)Z", (void*)&WB_TestSetForceInlineMethod},
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414 {CC"enqueueMethodForCompilation",
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415 CC"(Ljava/lang/reflect/Method;I)Z", (void*)&WB_EnqueueMethodForCompilation},
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416 {CC"clearMethodState",
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417 CC"(Ljava/lang/reflect/Method;)V", (void*)&WB_ClearMethodState},
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418 {CC"isInStringTable", CC"(Ljava/lang/String;)Z", (void*)&WB_IsInStringTable },
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419 {CC"fullGC", CC"()V", (void*)&WB_FullGC },
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420 };
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421
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422 #undef CC
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423
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424 JVM_ENTRY(void, JVM_RegisterWhiteBoxMethods(JNIEnv* env, jclass wbclass))
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425 {
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426 if (WhiteBoxAPI) {
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427 // Make sure that wbclass is loaded by the null classloader
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428 instanceKlassHandle ikh = instanceKlassHandle(JNIHandles::resolve(wbclass)->klass());
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429 Handle loader(ikh->class_loader());
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430 if (loader.is_null()) {
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431 ThreadToNativeFromVM ttnfv(thread); // can't be in VM when we call JNI
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432 jint result = env->RegisterNatives(wbclass, methods, sizeof(methods)/sizeof(methods[0]));
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433 if (result == 0) {
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434 WhiteBox::set_used();
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435 }
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436 }
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437 }
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438 }
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439 JVM_END